Text Diff — Compare Text Online Free
Compare two texts and find differences online for free. Side-by-side diff with color-coded additions and deletions.
Compare two blocks of text side by side and see exactly what changed. PDFFlare Text Diff highlights additions, deletions, and modifications line by line so you never miss a difference. Everything runs in your browser — your content stays private and is never sent to a server.
Whether you're reviewing document edits, checking code changes, or verifying contract updates, this tool makes differences easy to spot. Need to count the words in your final version? Use the Word Counter to get an instant breakdown.
How to Compare Text Online
Paste your original and modified text
Enter the original text on the left and the modified version on the right. You can paste content from any source.
Click Compare
Click the 'Compare' button to analyze both texts and find all differences line by line.
Review the diff
Additions are highlighted in green and deletions in red. A summary shows the total number of additions and deletions.
Common Use Cases
Comparing Document Revisions
Paste the original and edited versions of an essay, report, or article to see every change your editor or collaborator made at a glance.
Reviewing Code Changes
Compare two versions of a source file, configuration, or script to quickly identify what was added, removed, or modified between commits.
Checking Contract Modifications
Spot the exact clauses that changed between two versions of a contract, agreement, or terms of service — no redline software required.
Verifying Translations
Compare a translated text against the original to ensure no sentences were accidentally omitted or duplicated during translation.
Why Use PDFFlare Text Diff?
Color-Coded Output
Additions are highlighted in green, deletions in red. Unchanged lines shown normally — differences are instantly visible.
Side-by-Side Input
Paste your original and modified text in two side-by-side panels. Easy to set up and compare any two text versions.
Works with Code
Monospace font and whitespace preservation make this tool ideal for comparing code, configs, and structured data.
100% Private
All comparison logic runs in your browser. No server uploads, no data collection — your content stays on your device.